import timeit

num = 10000
t1 = timeit.Timer('testfunc(1)', 'def testfunc(x): return 5+x;')
t2 = timeit.Timer('testlambda(1)', 'testlambda = lambda x: x+5;')

time1 = t1.timeit(number=num)
time2 = t2.timeit(number=num)

print 'simple function:',time1/num
print 'simple lambda:',time2/num

'''
squishy@EXCALIBUR ~/Documents $ python funcvlambda.py
simple function: 2.92284110007e-07
simple lambda: 2.90683115584e-07
'''